Life on Other Planets

Compared to other planets, what makes Earth special?

• water
• life
• oxygen
• an atmosphere

Things with the ability to react, grow, reproduce and change are called ___

• plants
• planets
• life
• animals

As far as we know, what is the only planet that has life?

• Venus
• Jupiter
• Earth
• Saturn

At the top of the list of things we don't know is the question, "_____"

• "What are black holes?"
• "How big is the universe?"
• "How big is the Milky Way?"
• "Are we alone?"

What is the basis of all the world's food chains?

• the Sun
• plants
• fossil fuels
• electricity

Earth's orbit around the Sun is in a "sweet spot" because ___

• it allows water to exist mainly in liquid form
• it's cold enough to keep water frozen
• it's hot enough to turn all water to vapor
• it takes 365 days to orbit

Plants take energy from the Sun and turn it into ___

• electrical energy
• rabbits
• chemical energy
• warmth to survive

What does life on Earth NOT need to survive?

• food
• methane
• water
• warmth

A useful material that can be drawn from when needed is called ___

• a resource
• a fossil fuel
• liquid methane
• heat vents

No matter what aliens look like, their food chains would seem ___

• very different
• a little bit different
• a little bit familiar
• very familiar